Display device

1. A display device comprising:

a display module extending in a first direction;

a supporting portion disposed under the display module and which supports a part of the display module;

a first driving part connected to a first end of the display module to roll and unroll the display module;

a connecting portion connected to a second end of the display module; and

a second driving part connected to the connecting portion to roll and unroll the connecting portion,

wherein the second driving part unrolls the connecting portion when the first driving part rolls the display module, and the second driving part rolls the connecting portion when the first driving part unrolls the display module, and

wherein the first driving part and the second driving part maintain a constant distance therebetween while unrolling and rolling the display module and the connecting portion.

2. The display device of claim 1 , wherein

the second end of the display module moves away from the second driving part along the first direction when the first driving part rolls the display module, and

the second end of the display module moves toward the second driving part along the first direction when the first driving part unrolls the display module.

3. The display device of claim 2 , wherein

each of the first driving part and the second driving part rotates about a rotation axis parallel to a second direction crossing the first direction, and

the first driving part and the second driving part rotate in a same direction.

4. The display device of claim 1 , wherein

the display module includes:

a first part exposed outside; and

a second part extending from the first part, not exposed outside, and having a portion rolled around the first driving part, and

wherein the supporting portion is disposed under the first part to support the first part and is separated from the second part.

5. The display device of claim 4 , wherein

the display module includes:

a window; and

a display panel disposed under the window, and

wherein the window and the display panel are separated from each other in the second part.

6. The display device of claim 5 , wherein

the first driving part includes:

a first driving unit connected to a first end of the window to roll and unroll the window;

a second driving unit connected to a first end of the display panel to roll and unroll the display panel; and

a third driving unit connected to a first end of the supporting portion to roll and unroll the supporting portion.

7. The display device of claim 6 , wherein

the first driving unit, the second driving unit, and the third driving unit are spaced apart from each other,

the second driving unit is disposed between the first driving unit and the third driving unit, and

the third driving unit is closer to the second driving part than the first and second driving units.

8. The display device of claim 1 , further comprising:

a fastening portion which fixes a second end of the display module and a second end of the supporting portion,

wherein the connecting portion is connected to the display module and the supporting portion through the fastening portion.

9. The display device of claim 8 , wherein

the fastening portion includes:

a first body; and

a second body disposed on the first body, and

wherein the second body has a greater width in a second direction crossing the first direction than the first body.

10. The display device of claim 1 , wherein

the connecting portion includes:

a first belt extending in the first direction; and

a second belt extending in the first direction and spaced apart from the first belt in a second direction crossing the first direction.

11. The display device of claim 10 , wherein

a first end of the first belt and a first end of the second belt are disposed at a same position in the first direction.

12. The display device of claim 1 , wherein

the connecting portion contains a material having a predetermined elastic force.

13. The display device of claim 1 , wherein

the supporting portion includes:

a plurality of support bars arranged in the first direction;

a plurality of guide bars protruding from both sides of each of the plurality of support bars in a second direction crossing the first direction; and

a plurality of links connecting the plurality of guide bars.

14. The display device of claim 13 , further comprising:

a case including a first sidewall and a second sidewall which extend in the first direction and face each other in a second direction crossing the first direction,

wherein the display module is disposed between the first sidewall and the second sidewall and moves in the first direction.

15. The display device of claim 14 , wherein

the guide bars are inserted into guide grooves defined in the first sidewall and the second sidewall of the case.

16. The display device of claim 15 , wherein

the guide groove includes:

a first extension part extending in the first direction; and

a second extension part extending from the first extension part and disposed under the first extension part.

17. The display device of claim 14 , wherein

the first driving part and the second driving part are rotatably coupled to the first sidewall and the second sidewall.

18. A display device comprising:

a display module;

a supporting portion disposed under the display module and which supports a part of the display module;

a first driving part connected to a first end of the display module to roll and unroll the display module; and

a second driving part connected to a second end of the display module to roll and unroll the display module,

wherein

the second driving part unrolls the display module when the first driving part rolls the display module,

the first driving part unrolls the display module when the second driving part rolls the display module, and

the first driving part and the second driving part maintain a constant distance therebetween while unrolling and rolling the display module.

19. The display device of claim 18 , wherein

the display module includes:

a window; and

a display panel disposed under the window,

the first driving part includes:

a first driving unit connected to a first end of the window to roll and unroll the window; and

a second driving unit connected to a first end of the display panel to roll and unroll the display panel, and

the second driving part includes:

a fourth driving unit connected to a second end of the window to roll and unroll the window; and

a fifth driving unit connected to a second end of the display panel to roll and unroll the display panel.

20. The display device of claim 18 , wherein

the first driving part further includes:

a third driving unit connected to a first end of the supporting portion, and

the second driving part further includes:

a sixth driving unit connected to a second end of the supporting portion.